A 140 km long stretch of the Liwiec river valley. Some stretches have a natural character, along others the river is regulated. In some places the riverbanks are flat, covered by meadows and wet pastures, in other places they are high. There are fens and transitional mires, used as meadows and pastures, as well as riverine forests. On the riverbanks and some higher areas there are also pine Pinus woods. There are two small pond complexes (48 ha, 70 ha).
A total of 120 species had been recorded breeding by 1980. Breeding species of global conservation concern that do not meet IBA criteria: Gallinago media (one pair).
BirdLife International (2020) Important Bird Areas factsheet: Liwiec river valley. Downloaded from http://www.birdlife.org on 31/05/2020.